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Rhythm game or rhythm action is a genre of music-themed action video game that challenges a player's sense of rhythm. Games in the genre typically focus on dance or the simulated performance of musical instruments, and require players to press buttons in a sequence dictated on the screen. Doing so causes the game's protagonist or avatar to dance or to play their instrument correctly, which increases the player's score. Many rhythm games include multiplayer modes in which players compete for the highest score or cooperate as a simulated musical ensemble. While conventional control pads may be used as input devices, rhythm games often feature novel game controllers that emulate musical instruments. Certain dance-based games require the player to physically dance on a mat, with pressure-sensitive pads acting as the input device.
The 1996 title PaRappa the Rapper has been deemed the first influential rhythm game, whose basic template formed the core of subsequent games in the genre. In 1997, Konami's Beatmania sparked an emergent market for rhythm games in Japan. The company's music division, Bemani, released a series of music-based games over the next several years. The most successful of these was the dance mat game Dance Dance Revolution, which was the only Bemani title to achieve large-scale success outside of Japan. Imitations of Dance Dance Revolution flooded the genre until the release of Harmonix's Guitar Hero, which was inspired by similar, earlier Japanese games. However, Harmonix added rock music aimed at a Western audience. The game revitalized the rhythm genre and spawned the hugely successful Guitar Hero and Rock Band franchises, whose popularity expanded the console video game market and its demographics. The games provided a new source of revenue for the artists whose music appeared on the soundtracks.
By 2008, rhythm games were considered to be one of the most popular video game genres, behind other action games. However, by 2009, the market was saturated by spin-offs from the core titles, which led to a nearly 50% drop in revenue for music game publishers. As a result, the companies scaled back plans for further expansion in 2010. Despite these setbacks, the rhythm game market continues to expand, introducing a number of danced-based games like Just Dance and Dance Central that incorporate the use of motion controllers and camera-based controls like the Kinect. Existing games also continue to thrive on new business models, such as the reliance on downloadable content to provide songs to players.
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Rhythm game, or rhythm action,[1][2] is a subgenre of action game that challenges a player's sense of rhythm.[3] The genre includes dance games such as Dance Dance Revolution and music-based games such as Donkey Konga and Guitar Hero.[3] Games in the genre challenge the player to press buttons at precise times: the screen shows which button the player is required to press, and the game awards points both for accuracy and for synchronization with the beat.[3] The genre also includes games that measure rhythm and pitch, in order to test a player's singing ability,[4][5] and games that challenge the player to control their volume by measuring how hard they press each button.[6] While songs can be sight read,[7] players usually practice to master more difficult songs and settings.[8] Certain rhythm games offer a challenge similar to that of Simon says, in that the player must watch, remember, and repeat complex sequences of button-presses.[9] Rhythm-action can take a minigame format with some games blending rhythm with other genres or entirely comprising minigame collections.[10][11][12]
In some rhythm games, the screen displays an avatar who performs in reaction to the player's controller inputs.[3] However, these graphical responses are usually in the background,[6] and the avatar is more important to spectators than it is to the player.[4] In single-player modes, the player's avatar competes against a computer-controlled opponent, while multiplayer modes allow two player-controlled avatars to compete head-to-head.[3] The popularity of rhythm games has created a market for speciality input devices.[3] These include controllers that emulate musical instruments, such as guitars, drums, or maracas.[13] A dance mat, for use in dancing games, requires the player to step on pressure-sensitive pads.[14] However, most rhythm games also support more conventional input devices, such as control pads.[15]
The roots of the rhythm game genre has been traced back to the electronic game Simon,[13][16] invented in 1978 by Ralph Baer (who created the Magnavox Odyssey) and Howard Morrison. The game originated the "call and response" mechanic used by later rhythm video games, in which players take turns repeating increasingly complicated sequences of button presses.[13] Human Entertainment's Dance Aerobics was released in 1987, and allows players to create music by stepping on Nintendo's Power Pad peripheral for the NES video game console; it has been called the first rhythm action video game.[17][18] The 1996 title PaRappa the Rapper has also been credited as the first rhythm game,[19] and as one of the first music-based games in general.[20] It requires players to press buttons in the order that they appear on the screen,[19] a basic mechanic that formed the core of future rhythm games.[13] The success of PaRappa the Rapper sparked the popularity of the music game genre.[13][17] In 1997, Konami released the DJ-themed rhythm game Beatmania in Japanese arcades. Its arcade cabinet features buttons similar to those of a musical keyboard, and a rubber pad that emulates a vinyl record.[21] Beatmania was a surprise hit, inspiring Konami's Games and Music Division to change its name to Bemani in honor of the game,[21] and to begin experimenting with other rhythm game concepts.[22] Its successes include GuitarFreaks, which features a guitar-shaped controller, and 1998's Pop'n Music, a game similar to Beatmania in which multiple colorful buttons must be pressed.[22][23] While the GuitarFreaks franchise continues to receive new arcade releases in Japan, it was never strongly marketed outside of the country.[13] This allowed Red Octane and Harmonix to capitalize on the formula in 2005 with the Western-targeted Guitar Hero.[13] In general, few Japanese arcade rhythm games were exported abroad because of the cost of producing the peripherals and the resulting increases in retail prices.[17] The 1999 Bemani title DrumMania featured a drum kit controller, and could be linked with GuitarFreaks for simulated jam sessions. Similarly, this concept was later appropriated by Harmonix for their game Rock Band.[13]
Dance Dance Revolution, released in 1998, is a rhythm game in which players dance on pressure sensitive pads in an order dictated by on-screen instructions.[14] The game was highly successful both in and outside of Japan, unlike games such as GuitarFreaks, DrumMania and Beatmania, though the latter had some success in Europe.[24] Released the same year, Enix's Bust a Groove features a similar focus on dancing but employs a more conventional input method. The game contains competitive one-on-one battles, and grants the player more freedom than typical rhythm games.[13][25]
NanaOn-Sha, the creators of PaRappa the Rapper, released Vib-Ribbon in 1999. It eschews instrument-shaped controllers; instead, players maneuver the protagonist through an obstacle course by pressing buttons at correct times. The game's levels are generated by the background music, which players may change by inserting audio CDs. While it was praised for its unique style and artistry, Vib-Ribbon's simple vector graphics proved difficult to market, and the game was never released in North America.[13][15] Bemani's Samba de Amigo, released in arcades in 1999 and on the Dreamcast in 2000, features maraca-shaped, motion sensitive controllers. The game allows for two-player gameplay, provides a spectacle for onlookers and allows players to socialise while gaming.[13][26] In 2001, Taiko no Tatsujin combined traditional Japanese drums with contemporary pop music, and became highly successful in Japanese arcades.[27] The game was later released on consoles in the West as Taiko Drum Master, and the franchise continues to receive new installments in Japan.[13] Gitaroo Man featured a guitar-playing protagonist four years before the release of Guitar Hero, though the game employed a conventional rather than guitar-shaped controller.[13] Gitaroo Man's creator, Keiichi Yano, later created Osu! Tatakae! Ouendan, a rhythm game for the Nintendo DS that utilizes the handheld's touchscreen features. It became a highly demanded import title, which led to the release of an altered version of the game in the West—Elite Beat Agents—and a sequel in Japan.[28]
Harmonix was formed in 1995 from a computer music group at MIT. Beginning in 1998, the company developed music games inspired by PaRappa the Rapper.[29] In 2001, the company released Frequency, which puts the player in control of multiple instrument tracks. Ryan Davis of GameSpot wrote that the game provides a greater sense of creative freedom than earlier rhythm titles.[30] Frequency was critically acclaimed; however, marketing was made difficult by the game's abstract style, which removed the player's ability to perform for onlookers.[13] In 2003, Harmonix followed up Frequency with the similar Amplitude.[31] The company later released more socially driven, karaoke-themed music games in Karaoke Revolution and SingStar (2003 and 2004, respectively).[13] Donkey Konga, a GameCube title developed by Namco and released in 2003, achieved widespread success by leveraging Nintendo's Donkey Kong brand.[13]
In 2005, Harmonix and the small publisher RedOctane released Guitar Hero, a game inspired by Bemani's GuitarFreaks. However, instead of the Japanese pop that comprises the earlier title's soundtrack, Guitar Hero features Western rock music. The game reinvigorated the rhythm genre, which had stagnated because of a flood of Dance Dance Revolution sequels and imitations.[32][33] Guitar Hero spawned several sequels, and the franchise overall earned more than $1 billion, with the third installment ranking as the best selling game in North America in 2007.[34] Harmonix followed Guitar Hero with the Rock Band franchise, which also earned over $1 billion. Rock Band titles support multiple instrument controllers and cooperative multiplayer, allowing players to play as a full band.[35] The Guitar Hero franchise followed suit with the band-oriented, Neversoft-developed Guitar Hero World Tour.[36] Guitar Hero installments based on specific bands, such as Metallica and Aerosmith, were also published.[37] Additional songs for Guitar Hero and Rock Band were made available for purchase via the Internet, which generated further revenue.[35][37] Artists whose work is featured in the games receive royalties, and the increased publicity in turn generates further sales of their music.[35][37] The success of the Guitar Hero and Rock Band franchises widened the console video game market and its demographics, and the popularity of the genre drove increased sales of consoles.[38] In 2008, it was reported that music games had become the second most popular video game genre (behind action) in the United States, with 53% of players being female.[38]
Video game industry analysts considered 2009 to be a critical year for rhythm games, and they believed that it would allow them to gauge the future success of the genre.[39] Both the Guitar Hero and Rock Band franchises were expanded, and they received entries for handheld gaming devices and mobile phones. Specialized titles that targeted specific genres and demographics, such as Band Hero for pop music and Lego Rock Band for younger players, were released. Sales of music games were down in the first half of the year. This decline was attributed to fewer purchases of instrument controllers; it was assumed that players had already bought such controllers and were reusing them.[40] While analysts had expected that United States sales of Guitar Hero 5 and The Beatles: Rock Band would be high—close to or exceeding one million units each in the first month of their release[41]—sales only reached roughly half of those projections.[42][43] The failure to meet sales projections was partly attributed to the impact of the late-2000s recession on the video game industry, but analysts also considered it to be a sign of market saturation.[44][45][46] Further contributing to the decline was genre stagnation; the franchises retained the same basic gameplay over several iterations, giving consumers less incentive to buy additional titles.[47] As a result, analysts lowered their expectations for future music games; for example, projections of first quarter U.S. sales of DJ Hero, a Guitar Hero spin-off, were reduced from 1.6 million units to only 600,000.[48] Sales of rhythm games, which totalled $1.47 billion in 2008, reached only $700 million in 2009. Analysts predicted that the market would settle at the same "healthy" $500–600&nsbp;million level of the Call of Duty series.[49] Wedbush Securities analyst Michael Pachter concluded that the saturation of the rhythm game market accounted for one-third of the industry's 12% sales decline in 2009.[50]
The fallout of the weakening rhythm game market affected game developers, publishers and distributors. Companies in the latter two categories believed that most consumers would own at least one set of instrument controllers by 2010, which would increase the importance of software and downloadable content sales.[51] Activision scaled back its 2010 Guitar Hero release schedule to just two games, reducing the number of SKUs from 25 in 2009 to 10 in 2010.[52] The company closed several in-house developers, including RedOctane, Neversoft's Guitar Hero division, and Underground Development.[53][54] Viacom, which had paid Harmonix $150 million following the success of Rock Band in 2007, began seeking a "substantial" refund on that investment after weak sales in 2009.[55] Viacom also sought to negotiate new deals with music publishers to reduce the costs of the Rock Band series' licensed music.[56] Ultimately, the company began to seek a buyer for Harmonix during the third quarter of 2010.[57]
In 2010, rhythm game developers included new features in their products. For example, Rock Band 3 and Power Gig: Rise of the SixString support guitar controllers with strings, and both contain modes that teach players accurate fingering.[58][59] Despite this new content, sales of music games faltered in 2010. Guitar Hero: Warriors of Rock and DJ Hero 2 sold only 86,000 and 59,000 copies, respectively, in North America during their first week on the market.[60][61] This was in sharp contrast to Guitar Hero III, which had sold nearly 1.4 million units in its first week in 2008.[62][63] Through October 2010, music games achieved net sales of around $200 million, one-fifth of the genre's revenue during the same period in 2008. Analysts believed that the market likely would not break $400 million in revenue by the end of the year.[64] End year sales were less than $300 million.[65]
By the end of 2010, the rhythm market was considered "well past its prime", and developers shifted their focus to downloadable content and potential integration with motion control systems.[66] In late 2010, Viacom sold Harmonix to an investment-backed group and allowed it to continue developing Rock Band and Dance Central.[67] Citing the downturn in rhythm games, Activision shuttered their Guitar Hero division in February 2011.[68] Analysts suggested that the market for peripheral-based rhythm games may remain stagnant for three to five years, after which sales could resurge because of digital distribution models or the release of new video game consoles.[69][70]
With the introduction of motion controllers for the Xbox 360 (Kinect) and the PlayStation 3 (PlayStation Move) in 2010 and 2011, some analysts stated that the rhythm market would resurge thanks to dance- and band-based games that use platform-agnostic controllers.[71] Dance games such as Dance Central, Michael Jackson: The Game, and Child of Eden were based on the new motion sensing technology. Industry pundits believe that, because sales of peripheral-based music games are lagging and the popularity of pop music is surging, dance-based games will continue to thrive.[70][72][73][74] Dance games such as Just Dance and Dance Central boosted the rhythm genre's late-2010 sales; the latter was the top-selling game for the Kinect in North America in November 2010. Both games helped the genre increase its sales by 38% over November 2009, according to NPD.[75] Harmonix is expected to post more than $100 million in profit for 2011 buoyed by sales of Dance Central and downloadable content for the game, according to Bloomberg.[76] Just Dance overcame a poor critical reception to topple Call of Duty: Modern Warfare 2's best-seller status,[77] while Just Dance 2 (2010) became the best selling non-Nintendo game for the Wii. The Just Dance series competed with top action franchises for sales.[78] Tap Tap Revenge, the first installment of the iPhone rhythm series Tap Tap, was the platform's most downloaded game in 2008.[79] The Tap Tap franchise ultimately generated 15 million downloads and received a Guinness World Record as the "most popular iPhone game series".[80]
Rhythm games have been used for health purposes. For example, research has found that dancing games dramatically increase energy expenditure over that of traditional video games, and that they burn more calories than walking on a treadmill. Scientists have further suggested that, due to the large amount of time children spend playing video games and watching television, games that involve physical activity could be used to combat obesity.[81][82] Studies have found that playing Dance Dance Revolution can provide an aerobic workout,[83][84] in terms of a sufficiently intense heart rate, but not the minimum levels of VO2 max.[83] Based on successful preliminary studies, West Virginia, which has one of the highest rates of obesity and its attendant diseases in the US, introduced Dance Dance Revolution into its schools' physical education classes.[84][85] According to The New York Times, more than "several hundred schools in at least 10 states" have used Dance Dance Revolution (along with In the Groove)[84] in their curricula. Plans have been made to increase the number into the thousands in an effort to mitigate the country's obesity epidemic.[86] Arnold Schwarzenegger, former Governor of California, was a noted proponent of the game's use in schools.[87] In Japan, celebrities reported losing weight after playing Dance Dance Revolution, which drove sales of the game's home console version. Bemani's testers also found themselves losing weight while working on the game.[87] There is further anecdotal evidence that these games aid weight loss,[84] though the University of Michigan Health System has cautioned that dance games and other exergames should only be a starting point towards traditional sports, which are more effective.[88] Dance games have also been used in rehabilitation and fall-prevention programs for elderly patients, using customised, slower versions of existing games and mats.[89] Researchers have further experimented with prototypes of games allowing wider and more realistic stepping than the tapping actions found in commercial dance games.[90]
Guitar Hero games have been used alongside physical therapy to help recovering stroke patients, because of the multiple limb coordination that the titles require.[91] Blondie drummer Clem Burke has worked with researchers at the University of Chichester and the University of Gloucestershire to determine how games like Guitar Hero can address issues of "child and adult obesity, autism, stroke patients and health and mental well-being in the workplace".[92] Researchers at Johns Hopkins University have used Guitar Hero III and its controller to help amputee patients, and to develop new prosthetic limbs for these patients.[93] Researchers at University of Nevada, Reno modified a haptic feedback glove to work with the Guitar Hero freeware clone Frets on Fire, resulting in Blind Hero, a music game for visually impaired players that is played with only touch and audio.[94] MIT students collaborated with the government of Singapore and a professor at the National University of Singapore to create AudiOdyssey, a game which allows both blind and sighted gamers to play together.[95] Guitar Hero was used as part of a Trent University youth sleep study, which showed that, in general, players who played a song were better at it twelve hours later if that period included normal sleep.[96]
Guitar Hero and Rock Band have introduced people to rock music and inspired them to learn how to play the guitar. A study by Youth Music found that 2.5 million out of 12 million children in the United Kingdom have begun learning how to play real instruments after playing music video games such as Guitar Hero. The group believes that these video games can be incorporated into music educational programs.[97] Guitar teachers in the US have reported an increase in students who cite Guitar Hero as their inspiration to start learning. On the other hand, industry professionals, such the inventor of the Fretlight practice tool, have expressed scepticism over the game's educational value. There is anecdotal evidence that Guitar Hero aids rhythm and general hand-coordination, but also that it creates a false preconception of the difficulty of learning guitar, which can lead students to discontinue their studies.[98] Guitar Center conducted a survey which found that a majority of instrument-based rhythm gamers intended to take up a real instrument in the future while a majority of those who were already musicians had been inspired to play their instruments more.[99] Despite such popularity the guitar remains less popular than it was in the 1960s.[98] Some musicians have been critical of Guitar Hero's impact on music education. Jack White of The White Stripes stated that he was disappointed to learn that video games are the most likely venue where younger audiences will be exposed to new works, while Jimmy Page of Led Zeppelin does not believe that people can learn how to play real instruments from their video game counterparts.[100] Similarly, Prince has turned down opportunities to have his music in the Guitar Hero series, stating that he felt that it was "more important that kids learn how to actually play the guitar".[101] Other commentators have pointed to drum controllers (including the expanded, life-like Drum Rocker kit) used in such games as potentially useful in learning and creating music with real drums.[92][99]
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